Rest and dresser for grindstones, emery-wheels, and the like.



PATENTED APR. 23, 190?.

F. TRIER.

, BMERY WHEELS, AND- THE LIKE.

REST AND DRESSER FOR GRINDSTONES APPLICATION FiLBD FEB. 2. 1906.

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wlTA/EssEls OLQ/ww 5) ATws UNITED STATES PATENT OFFICE.

FRANK TRIER, OF LONDON, ENGLAND.

REST AND DRESSER FOR GRINDSTONES, EMERY-WHEELS, AND THE LIKE.

To (LZZ whom, it 77mg concern.-

Be it known that I, FRANK TRIER, a subject of Great Britain, residing at London, England, have invented new and useful Improvements in Rests and Dressers for Grindstones, Emery-Wheels, and the Like, of which the following-is a specification.

My improvements relate to apparatus for attachment to the troughs of grindstones or to the stands of emery wheels and the like and consist essentially in the construction of permanent rests, preferably as safety rests for supporting objects held in the hand whilst grinding and also so as-to form the support or slides for detachable tool slides carrying devices for truing or dressing grinding Wheels and also in the constructions of the truing or dressing devices.

A tool slide and tool in operation.

Referring to the accompanying drawings, Figure 1 is a front end elevation and Fig. 2 is a side elevation showing the improved rest fitted to the trough of a grinding wheel or grindstone. Fig. 3 is a front elevation of the tool slide and its tool shown separately. Fig. 4 is a plan of the improved rest with the Fig. 5 isa side elevation of Fig. 4. Fig. 6 is a central vertical cross section of the tool slide with its tool, and the rest, the tool slide and tool being shown separated from the rest for the sake of clearness.

The same references apply to the same parts in all the figures.

1 is the body part of the improved rest and dresser; it is provided with trunnions 2, 2 working in socket bearings 3, 3 of feet 4, 4 adapted to be bolted to the trough or stand 5 of the grindstone 6. The feet 4 are preferably made adjustable along the trunnions 2, and also along the trough 5, so as to enable the rest to be attached to troughs of different widths. The sockets 3, are split and provided with clamping screws 7. The rest body 1 is constructed with a straight edge 8 for supporting tools and other articles held in the hand whilst grinding, and also with a suitably shaped face or slide surface 9 for supporting a slide 10 carrying the tool 11 for dressing the grindstone. A recess 12 is provided in the face of the rest for containing the leading screw 13 of the tool slide shown in Fig. 3. This screw 13 is capable of being rotated by means of the handle 14 and also of endwise motion in a nut 15. This nut has a nutted shank 16 adapted to pass through a Specification of Letters Patent.

Application filed February 2, 1906. Serial No. 299,190.

Patented April 23, 1907.

hole 17 in the rest 1 for rapid and removable attachment to the rest.

I prefer as dressing tool to use the thin sheet metal conical tool 11 shown. It is fixed to a bush 18 that is free to revolve in the tool-holder 19 in which it is held at a suitable angle by means of a bolt 20.

The tool holder 19 is hinged by means of its lateral extension 21 on a hinge pin 22 capable of being rotated in end bearings 23, 23 on the tool slide 10 in such manner that the tool holder with the tool can be-turned over by hand from one extreme horizontal position into the opposite extreme horizontal position, so that not only is the angle of the tool reversed for cutting in both directions, but the tool is at the same time brought approximately into cutting position from one side of the grindstone to the other, thereby materially shortening the length of traverse required by the tool 11 and consequently of the tool slide.

The movement required to feed or set the tool-holder towards and away from the face of the grindstone is obtained by forming the pivot pin 22 with a screw threaded portion adapted to work in a nut 24 fitting in a recess formed in the hinge extension 21 of the tool holder.

25 is a hand wheel fixed on the pivot pin 22, and by turning said handwheel in one or the other direction the nut 24 will be caused to travel along the screw threaded portion of the pivot pin 22 and thus carry the tool holder with it forwards or backwards as desired.

When the rest 1 is required as a hand grinding rest it is swivelled into an upright position and leaning over slightly as shown in Fig. 2, the trunnions being preferably left free to turn in the bearings 3, 3. Collars, 26, 26 with set screws are provided on the trunnions to prevent the rest moving sideways; they are formed with lateral stops 27, 27 adapted to bear against abutments formed on the bearings 2, which prevent the rest falling forward under pressure of the grinding operation but leave it free to swing back and release the operators fingers should they he accidentally drawn in between the stone and the rest. When it is desired to dress the stone the rest 1 is swivelled into the more or less horizontal position shown in Fig. 5, and the slide 10 carrying the dressing tool is then attached to the rest by means of the nut 15 of the leading screw 13. The rest is then clamped in the bearings 8, 3, at the angle required to bring the tool to bear correctly on I the stone.

I may provide a cover for protecting the face of the rest from dirt when the rest is used in its function of a hand grinding rest.

Having now particularly described and as certained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is:

1. In an attachment for grinding wheels and the like, the combination of a swivelling rest, a tool slide, and means for fixing said slide removably to said rest.

2. In an attachment for grinding wheels and the like, the combination of a swivelling rest, means for clamping said rest in any desired position, a tool slide, and means for fixing said slide removably to said rest.

3. In an attachment for grinding wheels and the like, the combination of a swivelling rest, means .for limiting the forward movement of said rest, means for clamping said rest in any desired position, a tool slide, and means for fixing said slide removably to said rest.

4. In an attachment for grinding wheels and the like, the combination of a swivelling rest, means for limiting the forward movement of said rest, means for clamping said rest in any desired position, a tool slide fitted with a leading screw capable of rotary and also of endwise motion, a nut engaging with said leading screw, and a bolt carrying said nut mounted in said rest approximately in the central vertical plane thereof, whereby when said leading screw is rotated, said slide will be traversed along said rest.

5. In an attachment for grinding wheels and the like, the combination of a swivelling rest, means for limiting the forward movement of said rest, means for clamping said rest in any desired position, a tool slide, means for fixing said slide removably to said rest, and a tool-holder adapted to move transversely of said slide, and adapted also to swivel on a transverse axis on said slide, whereby the tool can be brought approximately into operative position from one side of the grinding wheel to the other as desired.

6. In an attachment for grinding wheels and the like, the combination of a swivelling rest, means for limiting the forward movement of said rest, means for clamping said rest in any desired position, a tool slide, means for fixing said slide removably to said rest, a screw threaded pivot pin mounted transversely in said slide approximately centrally thereof, a tool holder adapted to swivel on said pin, and a nut engaging with said screw-threaded pivot pin and adapted to bear on its faces against abutments on said tool-holder, whereby the said tool holder can be swung on said pivot pin from one side of the grinding wheel over to the other, and also whereby on actuating said nut, said tool holder may be traversed along said pivot pin towards and away from the grinding wheel.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

FRANK TRIER.

IVitnesses:

REGINALD GEORGE AoToN, JAMES PAGE. 

